Why do you think green roofs are becoming more popular?

here

Explanation:

a) Unlike traditional black tar roofs, green roofs reduce energy costs by absorbing heat instead of attracting it and providing natural insulation for buildings

b) Green roofs help reduce the Urban Heat Island Effect, a condition in which urban environments absorb and trap heat.

c) A green roof’s plants remove air particulates, produce oxygen and provide shade.  Additionally, this natural protection against extreme heat enables green roofs to last twice as long as traditional rooftops

d) Another important benefit of green roofs is their ability to reduce and slow stormwater runoff in urban environments. Because rooftops and streets in cities are hard surfaces, the volume and velocity of stormwater runoff increases tremendously and is a major source of flooding and pollution worldwide. Due to nonporous surfaces like pavement and rooftops, a typical city block generates more than five times more runoff than a woodland area of the same size. The ability a green roof has to absorb (and filter) water significantly lowers the risk of flash flooding and sewer overflows. In the summer, green roofs retain up to 90 percent of the precipitation that falls on them and up to 40 percent in the winter

link: https://sustainability.ncsu.edu/blog/changeyourstate/4-reasons-green-roofs-do-a-building-good/

did you figure it out? i need on this same question

what are the choices for abcd